<template>
<!-- 课程大纲 -->
  <div class="app-container">
    <h2 style="text-align: center;">发布新课程</h2>
    <el-steps :active="2" process-status="wait" align-center style="margin-bottom: 40px;">
      <el-step title="填写课程基本信息"/>
      <el-step title="创建课程大纲"/>
      <el-step title="提交发布"/>
    </el-steps>
    <el-button type="text" @click="addChapter()" >添加章节</el-button>
   

    <!-- 章节 -->
    <ul class="chanpterList">
        <li
            v-for="chapter in chapterNestedList"
            :key="chapter.id">
            <p>
                {{ chapter.title }}
                <span class="acts">
                    <el-button type="text" @click="addVideo(chapter.id)">添加课时</el-button>
                    <el-button type="text" @click="editChapter(chapter.id)">编辑</el-button>
                    <el-button type="text" @click="deleteChapter(chapter.id)">删除</el-button>
                </span>
            </p>
            <!-- 视频 -->
            <ul class="chanpterList videoList">
                <li
                    v-for="video in chapter.children"
                    :key="video.id">
                    <p>{{ video.title }}
                        <span class="acts">
                            <el-button type="text" @click="editVideo(video.id)">编辑</el-button>
                            <el-button type="text" @click="deleteVideo(video.id)">删除</el-button>
                        </span>
                    </p>
                </li>
            </ul>
        </li>
    </ul>

<!-- --------------------------------章节弹框------------------------------------------ -->
    <el-form label-width="120px">
      <el-form-item>
        <el-button @click="previous">上一步</el-button>
        <el-button :disabled="saveBtnDisabled" type="primary" @click="next">下一步</el-button>
      </el-form-item>
       <!-- 添加和修改章节表单 -->
      <el-dialog :visible.sync="dialogChapterFormVisible" title="添加章节">
          <el-form :model="chapter" label-width="120px">
              <el-form-item label="章节标题">
                  <el-input v-model="chapter.title"/>
              </el-form-item>
              <el-form-item label="章节排序">
                  <el-input-number v-model="chapter.sort" :min="0" controls-position="right"/>
              </el-form-item>
          </el-form>
          <div slot="footer" class="dialog-footer">
              <el-button @click="dialogChapterFormVisible = false">取 消</el-button>
              <el-button type="primary" @click="saveOrUpdate">确 定</el-button>
          </div>
      </el-dialog>
    </el-form>

<!-- --------------------------------小节弹框------------------------------------------ -->

      <!-- 添加和修改课时表单 -->
    <el-dialog :visible.sync="dialogVideoFormVisible" title="添加课时">
      <el-form :model="video" label-width="120px">
        <el-form-item label="课时标题">
          <el-input v-model="video.title"/>
        </el-form-item>
        <el-form-item label="课时排序">
          <el-input-number v-model="video.sort" :min="0" controls-position="right"/>
        </el-form-item>
        <el-form-item label="是否免费">
          <el-radio-group v-model="video.free">
            <el-radio :label="true">免费</el-radio>
            <el-radio :label="false">默认</el-radio>
          </el-radio-group>
        </el-form-item>
        <el-form-item label="上传视频">
          <!-- TODO -->
          
          <el-form-item label="上传视频">
              <el-upload
                    :on-success="handleVodUploadSuccess"
                    :on-remove="handleVodRemove"
                    :before-remove="beforeVodRemove"
                    :on-exceed="handleUploadExceed"
                    :file-list="fileList"
                    :action="BASE_API+'/vod/video/upload'"
                    :limit="1"
                    class="upload-demo">
              <el-button size="small" type="primary">上传视频</el-button>
              <el-tooltip placement="right-end">
                  <div slot="content">最大支持1G，<br>
                      支持3GP、ASF、AVI、DAT、DV、FLV、F4V、<br>
                      GIF、M2T、M4V、MJ2、MJPEG、MKV、MOV、MP4、<br>
                      MPE、MPG、MPEG、MTS、OGG、QT、RM、RMVB、<br>
                      SWF、TS、VOB、WMV、WEBM 等视频格式上传</div>
                  <i class="el-icon-question"/>
              </el-tooltip>
              </el-upload>
          </el-form-item>



        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="dialogVideoFormVisible = false">取 消</el-button>
        <el-button :disabled="saveVideoBtnDisabled" type="primary" @click="saveOrUpdateVideo">确 定</el-button>
      </div>
    </el-dialog>

  </div>
  
</template>
<script>
import chapter from '@/api/edu/chapter'
import video from '@/api/edu/video'

export default {
  data() {
    return {
      saveBtnDisabled: false, // 保存按钮是否禁用
      chapterNestedList:[],   //小节列表
      courseId:'',      //课程id
      dialogChapterFormVisible:false,   //弹框方法
      chapter:{    //章节对象
          id:'',
          title: '',
          sort: 0,
          courseId:'',
      },
      video: {// 课时（小节）对象 
          id:'',
          title: '',
          sort: 0,
          free: 0,
          courseId:'',
          videoSourceId: '',
          chapterId:'',
          videoOriginalName:'' //原始文件名称 
        },
      dialogVideoFormVisible:false,     //小节弹框
      // ----------------------  视频上传------------------------
      fileList: [],//上传文件列表
      BASE_API: process.env.BASE_API // 接口API地址

    }
  },
  created() {
    //获得路由的id值  有参数并且参数有id
    // console.log(this.$router.params)
    if(this.$route.params && this.$route.params.id){            //route  路由    注意不要写成 router
      console.log(this.$route.params.id)
      this.courseId = this.$route.params.id
       //根据课程id查询章节和小节
        this.getChapterVideo()
    }
    // console.log('chapter created')

   
  },
  methods: {
     // -----------------------------------  视频管理------------------------------------------------
        //上传成功回调  file 参数是框架带的 
    handleVodUploadSuccess(response, file, fileList) {
      //上传视频id赋值  videoId为上传成功后返回的值
      this.video.videoSourceId = response.data.videoId
      //上传视频名称赋值       file.name你上传的文件的名字
      this.video.videoOriginalName = file.name
    },
    //视图上传多于一个视频
    handleUploadExceed(files, fileList) {
      this.$message.warning('想要重新上传视频，请先删除已上传的视频')
    },
    //点击删除X  弹窗的提示
    beforeVodRemove(file, fileList) {
      return this.$confirm(`确定移除 ${file.name}？`)
    },
    handleVodRemove(file, fileList) {
      console.log(file)
      video.removeById(this.video.videoSourceId).then(response=>{
        this.$message({
          type: 'success',
          message: '删除成功！'
        })
        //视频列表清空
        this.fileList = []
        //上传视频数据
        this.video.videoSourceId = ''
        this.video.videoOriginalName = ''
      })
    },
    // --------------------------------------小节管理-----------------------------------------------
    //弹框
    addVideo(chapterid){
        this.dialogVideoFormVisible = true;
        this.video.chapterId = chapterid;

    },
    //添加小节  点击确定
    saveOrUpdateVideo(){
      this.video.courseId = this.courseId;
      //判断是否有小节id
        if(!this.video.id){
          //添加
          this.dialogVideoFormVisible = false;
            video.addVideoLsit(this.video)
                .then(request => {
                  //刷新页面
                  this.getChapterVideo()
                    this.$message({
                      type: 'success',
                      message: '添加成功!'
                    })
              })
              
              
        }else{
          //修改
          video.editVideo(this.video)
          .then(response => {
            this.$message({
              type:'success',
              message:'修改成功！'
            })
          })
          this.dialogVideoFormVisible = false;
          //刷新页面
          this.getChapterVideo()
        }
    },
    deleteVideo(videoId){
      this.$confirm('此操作将永久删除该标题, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).then(() => {
             console.log("删除")
             //调用teacher中的id
             video.removeVideoById(videoId)
                .then(response => {
                      this.$message({
                      type: 'success',
                      message: '删除成功!'
                    })
                    this.getChapterVideo()// 刷新列表页
                })
            })
    },

    //编辑小节 弹框回显数据
    editVideo(videoId){
         //弹框
      console.log("弹框")
      this.dialogVideoFormVisible = true
      //调用接口
      video.getVideoList(videoId)
      .then(response => {
        this.video = response.data.video
      })
    },



    // --------------------------------------章节管理-----------------------------------------------
    //点击添加章节
    addChapter(){
      //先清空下文本框的值
      this.chapter.title = ''
      this.chapter.sort = 0
      this.dialogChapterFormVisible=true
    },
     
    //删除章节
    deleteChapter(chapterid){
      this.$confirm('此操作将永久删除该标题, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).then(() => {
             //调用teacher中的id
             chapter.deleteChapterById(chapterid)
                .then(response => {
                      this.$message({
                      type: 'success',
                      message: '删除成功!'
                    })
                    this.getChapterVideo()// 刷新列表
                })
            })
    },
    //点击编辑修改章节数据回显
    editChapter(chapterId){
      //弹框
      console.log("弹框")
      this.dialogChapterFormVisible = true
      //调用接口
      chapter.getChapterVideoByChapterId(chapterId)
      .then(response => {
        this.chapter = response.data.chapter
      })
    },
    //点击提交添加章节或者更新
    saveOrUpdate() {
      this.saveBtnDisabled = true
      //判断添加修改
      if (!this.chapter.id) {
        this.saveData()
        console.log("添加")
      } else {
        console.log("修改")
        this.updateData()
      }
    },
    //提交添加章节
    saveData() {
      this.chapter.courseId = this.courseId
      //调用添加章节方法
      chapter.addChapterList(this.chapter)
      .then(response => {
        this.$message({
          type: 'success',
          message: '保存成功!'
        })
        this.helpSave()
      }).catch((response) => {
        this.$message({
          type: 'error',
          message: response.message
        })
      })
    },
    //提交修改章节
    updateData() {
      //调用修改的方法
      chapter.updateChapterVideo(this.chapter)
      .then(response => {
        this.$message({
          type: 'success',
          message: '修改成功!'
        })
        this.helpSave()
      }).catch((response) => {
        this.$message({
          type: 'error',
          message: response.message
        })
      })

    },
    //点击添加提交后的操作    
    helpSave(){
      this.dialogChapterFormVisible = false// 如果保存成功则关闭对话框
      this.getChapterVideo()// 刷新列表
      this.chapter.title = ''// 重置章节标题
      this.chapter.sort = 0// 重置章节标题
      this.saveBtnDisabled = false
    },


    //查询当前课程id查询章节和小节
    getChapterVideo(){
        chapter.getAllChapterVideo(this.courseId)
        .then((result) => {   //成功返回
          this.chapterNestedList = result.data.items
        }).catch((err) => {   //失败返回
          
        });
    },
    previous() {
      
      this.$router.push({ path: '/course/info/'+this.courseId })
    },
    next() {
      console.log('next')
      this.$router.push({ path: '/course/publish/'+this.courseId })
    }
  }
}
</script>

<style scoped>
.chanpterList{
    position: relative;
    list-style: none;
    margin: 0;
    padding: 0;
}
.chanpterList li{
  position: relative;
}
.chanpterList p{
  /* 浮动会导致编辑按钮无法点击 */
  /* float: left;         */
  font-size: 20px;
  margin: 10px 0;
  padding: 10px;
  height: 70px;
  line-height: 50px;
  width: 100%;
  border: 1px solid #DDD;
}
.chanpterList .acts {
    float: right;  
    font-size: 14px;
}
.videoList{
  padding-left: 50px;
}
.videoList p{
  /* float: left; */
  font-size: 14px;
  margin: 10px 0;
  padding: 10px;
  height: 50px;
  line-height: 30px;
  width: 100%;
  border: 1px dotted #DDD;
}
</style>
